The AMD Catalyst™ 12.1 Preview includes all of the features found in AMD Catalyst™ 11.12 and also includes all of the latest optimizations found in the AMD Catalyst 11.11c performance drivers (AMD Catalyst 11.12 does not include the latest 11.11c optimizations). It is highly recommended that all gamers use the AMD Catalyst 12.1 Preview driver.

AMD HD3D technology support enhancement· Enables support for AMD HD3D technology in conjunction with AMD CrossFireX configurations· Delivers a new Stereo 3D mode over HDMI 1.4a connections - 1080p at 30Hz is now enabled on supported displays.

AMD Catalyst Control Center / Vision Engine Control Center enhancements – Application Profiles· AMD Catalyst 12.1 Preview driver enables users to create per application profiles to individually control 3D and CrossFireX settings for Direct3D applications· Please be sure to select the “Restore Factory Defaults” option under the Catalyst Control Center Preferences menu before using the new application profiles feature – this ensures there are no compatibility issues between previous drivers and the new AMD Catalyst 12.1 Preview driver with regards to application profiles

The AMD Catalyst™ 12.2 Preview includes all of the features found in AMD Catalyst™ 12.1, plus additional fixes that are not included in the AMD Catalyst 12.1 release. Please note that AMD Radeon HD 7900 users should keep using the 8.921.2 RC11 driver found here (the 12.2 preview does not supported the AMD Radeon HD 7900 Series):http://support.amd.com/us/kbarticles/Pages/RC11Driver.aspxFeature highlights of the AMD Catalyst™ 12.2 driver:

AMD Eyefinity 2.1 technology enhancements Additional resolution support: Users can now choose from a larger set of resolutions when running AMD Eyefinity Dynamic Configuration Changes: Switching between different display configurations will occur automatically when physically plugging/un-plugging displays HydraVision™ enhancements: The Windows Task bar can now be moved and resized based on users preference Profile Manager improvements: Increased support for Display Groups (including 5x1) and Extended configurations within the Profile Manager

The 12.2 Pre-certified driver is a much newer driver version compared to the 12.2 Preview

The AMD Catalyst™ 12.2 Certified driver (It is the same driver as the Catalyst 12.2 Pre-Certified, but will be officially Microsoft® certified) will be posted in late February or very early March 2012.Feature highlights of the AMD Catalyst 12.2 pre-certified driver:Windows 7 and Windows® Vista® support for the AMD Radeon™ HD 7900 Series and AMD Radeon HD 7700 Series

Enables support for Windows 7 64-bit/32-bit and Windows Vista 64-bit/32-bit Windows XP support will be made available in AMD Catalyst 12.4

Super Sampling Anti-Aliasing is now available for DirectX® 10 and DirectX 11 applications

Supported on the AMD Radeon HD 7900 and 7700 Series Users can now enable Super Sample Anti-Aliasing and Adaptive Anti-Aliasing through the AMD Catalyst Control Center for DirectX 10 and DirectX 11 applications Applications must support in game Anti-Aliasing for the feature to work (Forced on Anti-Aliasing through the Catalyst Control Center is not supported for DirectX 10 and DirectX 11 applications)

AMD Eyefinity 2.1 technology enhancements

Custom resolutions – users can now choose from a much larger set of display resolutions for their AMD Eyefinity configurations Dynamic Configuration Changes: Switching between different display configurations (when physically plugging/un-plugging displays) will occur automatically by loading the appropriate profile HydraVision enhancements: The Windows Task bar can now be moved and resized based on users preference Profile Manager improvements: Users can now create multiple Display profiles, enabling users to seamlessly switch between various AMD Eyefinity and Display Configurations